Low mass, indirectly heated, fast warm-up heater-cathode assembly
A substrate of substantially pure, hexagonal crystal, alpha alumina (sapphire) has a central hub and three radiating spokes. One surface of the substrate has a metallized cathode base thereon and the opposite surface is provided with a metallized heater. Electrical connection to the cathode base and...
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| Sprache: | eng |
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| Zusammenfassung: | A substrate of substantially pure, hexagonal crystal, alpha alumina (sapphire) has a central hub and three radiating spokes. One surface of the substrate has a metallized cathode base thereon and the opposite surface is provided with a metallized heater. Electrical connection to the cathode base and heater are provided via the spokes, which are also appropriately metallized. A suitable electron emissive material is applied to the cathode base. |
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